Collapsible post, beam, &amp;c.



Patented Aug. 2|. I900.

J. SANDMAYER.

GOLLAPSIBLE POST, BEAM, 6w.

(Application filed May 1, 1899.)

(No Model.)

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MEWS PEYEHS co. Pnorauma WASHINGTON, 0, Cir

UNITED STATES PATENT OFFICE.

- JEAN SANDMAYER, OF SAARBURG, GERMANY.

COLLAPSIBLE POST, BEAM, 84.0.

SPECJIFICATION forming part of Letters Patent No. 656,424, dated August21, 1900.

' Application filed May 1,1399. Serial No. 715,183. (Nomodeh) To allwhom it may concern:

Be it known that LJEAN SANDMAYER, a 'cit-izen of the Empire of Germany,residing at Saarburg, Germany, have invented certain new and usefulImprovements in Collapsible Posts, Beams, &c., of which the following isa specification.

My present invention relates to improvements in collapsible posts,uprights, or the like, the object being to provide a device of this kindin which a plurality of slidable parts or sticks are employed andprovided with suitable means to hold the same in operative position; andit consists in the features of construction and combination of partsfully de scribed hereinafter and specifically pointed out in theappended claim; and in order that this my invention may be the morereadily understood and carried into eifect or practice reference ishereby made to the accompany ing drawings, in which- Figure 1 is a sideelevation of a collapsible post made in accordance with my invention inan inoperative position. Fig. 2 is an enlarged view of the device forlocking the movable parts in operative position. Fig. 3 showsahorizontal section of the movable part. Fig, 4 is a side elevation of apost made in accordance with my invention in an operative position.

Like numerals refer to like parts throughout all the figures.

The improved device may be composed of two, three, or more parts 1 2 3in the form of sticks or beams or posts, in accordance with the use tobe made thereof. One side of said sticks or beams is provided with adovetail groove 4:, (see dotted lines, Fig. 1,) adapted to be engaged bya corresponding rib 5, formed on the opposite side of the other stick orbeam. At determinate points said sticks or,

beams are provided with preferably-rectangular recesses 6, serving toreceive the devices for locking the movable partsl 2 3 in operativeposition. Said device embodies a preferably-metal box 7, adapted to fitinto recess 6 and closed by a plate 8, lodged into the material ofthestick or beam, so as to leave a perfect sliding-surface, said platebeing secured to the stick, beam, or post by means of screws 9 or in anysuitable way. The plate 8 is provided with a circular aperture oropening 10, through which passes loosely a headpin 11, which isconstantly pressed toward the outside by the action of a suitable spring12, secured to the rear wall of box 7. The pin 11 may be guided in itsmovements by a washer or equivalent 13, suitably secured to plate 8.

If it is desired to use the device, one has but to draw the movableparts 2 3 until the pins 11 of same reach the upper ends of therespective sticks, beams, or posts,fwhereby saidpins 11 are pushedoutward by the action of springs 12 to look the sticks, beams, or postsin operative position and prevent them from sliding downward again uponeach other. If the device is out of use, the pins 11 are pushed inwardagain by hand, whereby the sticks, beams, or posts may be readily movedover each other.

The stick as herein described may be employed as a guard-post forstep-ladders. To this end the lower end thereof is to be secured to theladder, and if the user stands on the upper step thereof he may readilybring the device into operative positionthat is, draw the various partsof the device over each otherto guard him from falling down.

. Changes in the minor details of construction and arrangement of partsmay be made without departing from the'scope or sacrificing any of theadvantages of the invention.

Having fully described my invention, what I claim, and desire to secureby Letters Patent, is-,

A collapsible post formed of two or more sections slidably securedtogether by tongueand-grooved connections, and provided with means forlocking said sections in operative position consisting of a metal boxprovided with a cylindrical opening, and a spring-actuated pin adaptedto work in said opening against one section, as set forth. 3

JEAN SANDMAYER.

Witnesses:

WILHELM BARTH, WILHELM Homes.

